#include <stdio.h> #include <errno.h> #include <sys/ipc.h> #include <sys/msg.h> #include <sys/sem.h> #include <sys/shm.h> #include <sys/select.h> #include <sys/types.h> #include <unistd.h> #include "qemu.h" int do_strace=0; struct syscallname { int nr; const char *name; const char *format; void (*call)(const struct syscallname *, abi_long, abi_long, abi_long, abi_long, abi_long, abi_long); void (*result)(const struct syscallname *, abi_long); }; /* * Utility functions */ static void print_ipc_cmd(int cmd) { #define output_cmd(val) \ if( cmd == val ) { \ gemu_log(#val); \ return; \ } cmd &= 0xff; /* General IPC commands */ output_cmd( IPC_RMID ); output_cmd( IPC_SET ); output_cmd( IPC_STAT ); output_cmd( IPC_INFO ); /* msgctl() commands */ #ifdef __USER_MISC output_cmd( MSG_STAT ); output_cmd( MSG_INFO ); #endif /* shmctl() commands */ output_cmd( SHM_LOCK ); output_cmd( SHM_UNLOCK ); output_cmd( SHM_STAT ); output_cmd( SHM_INFO ); /* semctl() commands */ output_cmd( GETPID ); output_cmd( GETVAL ); output_cmd( GETALL ); output_cmd( GETNCNT ); output_cmd( GETZCNT ); output_cmd( SETVAL ); output_cmd( SETALL ); output_cmd( SEM_STAT ); output_cmd( SEM_INFO ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); output_cmd( IPC_RMID ); /* Some value we don't recognize */ gemu_log("%d",cmd); } #ifdef TARGET_NR__newselect static void print_fdset(int n, abi_ulong target_fds_addr) { int i; gemu_log("["); if( target_fds_addr ) { abi_long *target_fds; target_fds = lock_user(VERIFY_READ, target_fds_addr, sizeof(*target_fds)*(n / TARGET_ABI_BITS + 1), 1); if (!target_fds) return; for (i=n; i>=0; i--) { if ((tswapl(target_fds[i / TARGET_ABI_BITS]) >> (i & (TARGET_ABI_BITS - 1))) & 1) gemu_log("%d,", i ); } unlock_user(target_fds, target_fds_addr, 0); } gemu_log("]"); } static void print_timeval(abi_ulong tv_addr) { if( tv_addr ) { struct target_timeval *tv; tv = lock_user(VERIFY_READ, tv_addr, sizeof(*tv), 1); if (!tv) return; gemu_log("{" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "}", tv->tv_sec, tv->tv_usec); unlock_user(tv, tv_addr, 0); } else gemu_log("NULL"); } #endif /* * Sysycall specific output functions */ /* select */ #ifdef TARGET_NR__newselect static long newselect_arg1 = 0; static long newselect_arg2 = 0; static long newselect_arg3 = 0; static long newselect_arg4 = 0; static long newselect_arg5 = 0; static void print_newselect(const struct syscallname *name, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { gemu_log("%s(" TARGET_ABI_FMT_ld ",", name->name, arg1); print_fdset(arg1, arg2); gemu_log(","); print_fdset(arg1, arg3); gemu_log(","); print_fdset(arg1, arg4); gemu_log(","); print_timeval(arg5); gemu_log(")"); /* save for use in the return output function below */ newselect_arg1=arg1; newselect_arg2=arg2; newselect_arg3=arg3; newselect_arg4=arg4; newselect_arg5=arg5; } #endif static void print_semctl(const struct syscallname *name, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", name->name, arg1, arg2); print_ipc_cmd(arg3); gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4); } static void print_execve(const struct syscallname *name, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { abi_ulong arg_ptr_addr; char *s; if (!(s = lock_user_string(arg1))) return; gemu_log("%s(\"%s\",{", name->name, s); unlock_user(s, arg1, 0); for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) { abi_ulong *arg_ptr, arg_addr, s_addr; arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1); if (!arg_ptr) return; arg_addr = tswapl(*arg_ptr); unlock_user(arg_ptr, arg_ptr_addr, 0); if (!arg_addr) break; if ((s = lock_user_string(arg_addr))) { gemu_log("\"%s\",", s); unlock_user(s, s_addr, 0); } } gemu_log("NULL})"); } #ifdef TARGET_NR_ipc static void print_ipc(const struct syscallname *name, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { switch(arg1) { case IPCOP_semctl: gemu_log("semctl(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", arg1, arg2); print_ipc_cmd(arg3); gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4); break; default: gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")", name->name, arg1, arg2, arg3, arg4); } } #endif /* * Variants for the return value output function */ static void print_syscall_ret_addr(const struct syscallname *name, abi_long ret) { if( ret == -1 ) { gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno)); } else { gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret); } } #if 0 /* currently unused */ static void print_syscall_ret_raw(struct syscallname *name, abi_long ret) { gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret); } #endif #ifdef TARGET_NR__newselect static void print_syscall_ret_newselect(const struct syscallname *name, abi_long ret) { gemu_log(" = 0x" TARGET_ABI_FMT_lx " (", ret); print_fdset(newselect_arg1,newselect_arg2); gemu_log(","); print_fdset(newselect_arg1,newselect_arg3); gemu_log(","); print_fdset(newselect_arg1,newselect_arg4); gemu_log(","); print_timeval(newselect_arg5); gemu_log(")\n"); } #endif /* * An array of all of the syscalls we know about */ static const struct syscallname scnames[] = { #include "strace.list" }; static int nsyscalls = sizeof(scnames)/sizeof(struct syscallname); /* * The public interface to this module. */ void print_syscall(int num, abi_long arg1, abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) { int i; const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")"; gemu_log("%d ", getpid() ); for(i=0;i<nsyscalls;i++) if( scnames[i].nr == num ) { if( scnames[i].call != NULL ) { scnames[i].call(&scnames[i],arg1,arg2,arg3,arg4,arg5,arg6); } else { /* XXX: this format system is broken because it uses host types and host pointers for strings */ if( scnames[i].format != NULL ) format = scnames[i].format; gemu_log(format,scnames[i].name, arg1,arg2,arg3,arg4,arg5,arg6); } return; } gemu_log("Unknown syscall %d\n", num); } void print_syscall_ret(int num, abi_long ret) { int i; for(i=0;i<nsyscalls;i++) if( scnames[i].nr == num ) { if( scnames[i].result != NULL ) { scnames[i].result(&scnames[i],ret); } else { if( ret < 0 ) { gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, target_strerror(-ret)); } else { gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret); } } break; } }